Freightliner XB Line Courtesy Bulb Size

The Freightliner XB Line courtesy light requires a 105 bulb size for the specific lighting application. Data for the bulb specifications covers the range from 1995 to 1997.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Type	Shop
1995-1997	105	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	105	Check Price

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Additional Notes

The bulb type 105 is an ANSI-standardized single-filament bulb rated at 12 volts and 13 watts, fitted with a BA15s bayonet base.
The Freightliner XB Line uses the 105 bulb for courtesy lighting across the 1995-1997 model years.
The BA15s base designation indicates a single-contact bayonet fitting with a 15mm base width, which is not interchangeable with dual-contact BA15d variants.
The 105 is a variant of the 1156 bulb type; however, wattage and voltage tolerances may differ between these variants, and substitution without confirming electrical compatibility is not advised.
ANSI standardization of the 105 bulb means the specification applies uniformly across US and Canadian markets.